Peters



3 Sheets-Sheet 1.

(N'o'Model.)

VGOGKLE SCREEN.

Patented A131224,

No.v 276,523.

(No Model.) s sheets-sheen 2.

vJ. B. GORNWALL.

` GOGKLE SGREEN, No. 276,523. Patented Apr.24, 1883.

(No Model.) 3 sheets-'sheet 3. J. B. CORNWALL cocKL-.E SCREEN. No.276,523. Patented Apr. 24, 1883.

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UNITED STATES PATENT GEEIcE.

JOHN E. COENWALL, OE MOLINE, ILLINOIS, AssIGNOE 'ro TEE EAENAED a LEAsMANUFACTURING COMPANY, OE sAME PLACE.

CocKLE-scREEN.

SPECIFICATIONMfo-rming part of Letters Patent No. 276,523, dated April 94, 1883.

Application filed `Det-,amber 11, Issa. (No model.) I

To all whom it may concern Be it known that I, JOHN B. CORNWALL, o

Moline, in the county ofRock Island and State of Illinois, have inventedcertain new and useful Improvements in Cockle-Screens; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, and to theletters of reference marked thereon, 1o which form part of thisspecification, in

which- V Figure I is a perspective view of one end of the machine, thebelts C being removed. Fig. 2 is a perspective view of the opposite endof the machine. Fig. 3 is a vertical cross-section through themachine,the discharge-hopper be. ing removed. Fig. 4is an end elevation.Fig. 5 is a side elevation of my invention. Fig. 6 is a detail, showingone of the oblique blades 2o of the drum inside of the cockle-screen B.

Similar letters of reference indicate corresponding parts in the severalfigures.V

My invention relates to certain novel improvements on the cockle-'screenfor which Letters Patent were granted to me bearing date on the 14th dayof September, 1880, and numbered 232,242; and the nature of my inventionconsists in such combination of parts as will be hereinafter claimed. 3oA designates the frame of the machine, in which is supported acylindrical cockle-screen, B, that is embraced about two-thirds of itscircumference by means of endless belts C C C, preferably made oftwo-ply7 rubber b elt- 3 5 ingsay about twelve inches wide. These beltsC pass around pulleys a, which are endwise adjustable on their shafts,and which are secured thereon by means of set-screws s, as shown in Fig.5. 4o The pulley-shaft D is mounted in journalboxes on top of the frameA, on one side of the vertical plane intersecting the 4longitudinal axisof the said screening-cylinder B.

The pulley-shaft D is mounted in journal- 4 5 boxes on cheek-platesA,and this roller is arranged on the right-hand side of the vertical planeintersecting the longitudinal axis of the screening-cylinder B, beneathsaid cylinder.

The pulley-shaft D2 is arranged on the outside 5o of the frame A, andthis shaft has its end bearings in spring-hangers E, which areadjustable by means of screw-bolts p, or their equivalents, for thepurpose of regulating the tension or pressure ofthe belts C C U againstthe circumference of the screening-cylinder. The shaft D2 is providedwith the pulleys a, held by set-screws, as shown in Fig. 5, which areindependently endwise adj nstable for the pur- Y pose of properlyadapting'the belts to thecircumference ofthe cylinder B, therebyenabling 6o me to perfectly control and guide the said belts and causethem to run straight, which cannot be done where a single broad apron isemployed, as described in my Letters Paten-t above referred to.

F designates a revolving agitating-wheel, which is arranged inside ofthe screening-cylinder B, eccentric to the longitudinal axis thereof.`The blades b of this'wheel F are set obliquely to its axis, or aregiven a spiral twist, 7o

as shown in Fig. 3, so that they operate as conveyers to move the grainthrough the cylinder, as well as to beat back the grain over theinternal surface of this cylinder Bthus causing the cockle to settle inthe perforations therein. It will thus be observed that I construct thescreening-cylinder B with imperforated, portions or blanks (about two tothree inches wide, more or less) extending around the cylinder, andlettered c; also a portion, c, 8o imperforated at each end of thecylinder. The object of these imperforated `portions c is for theendless belts C to lap on, and they should be wide enough to allow alittle sidewise movement of said belts without leaking grain or S5seeds.

G designates a stationary brush, which is adjustably secured to thecheek-plates A of the frame A by means of set-screws ax, and arranged sothat it can be made to bear against 9o the inner side of the cylinder Bwith more or less pressure. as may be required. The object of the brushG is to brush out any wheat which may be lodged in the perforations ofthe cylinder B, and also to push the cockle through 9 5 the perforationsafter the cockle passes above and beyond the shaft D.

A pulley, d, is keyed on one end of the shaft ofthe agitating-wheel F,to receive motion from adriving-powerbymeansof a belt. (Notshown Ioo inthe drawings.) A pulley and belt applied to I 3. In a cockle-separator,the combination ot' the opposite end of the' said Wheel-shaft givemotion to the shaft D on top of the main frame A. This shaft D givesmotion to the belts which partly encircle the screening-cylnder B, andthus the latter is revolved.

In the operation of the machine the cockle lodges in the perforations ofthe cylinder B, and for a timeis prevented from falling through theseperforations by the belts C. It is carried up by the revolution of' thecylinder until the belts leave the latter to pass over the shaft D, whenthe cockle drops through the cylinder onto the belts and is carried overthe shaft D and discharged. The Wheat is fed into the screening-cylinder through a hopper, J, and discharged from the opposite end ofthe cylinder.

rlhe belts or aprons C are preferably arranged between arc-shapedguide-plates, which are secured to the main frame ot' the machine.

Having described my in vention, what I claim as new, and desire tosecure by Letters Patent, 1S-

1. In a cockle-separating machine, the screening cylinder constructedwith imperforated bands or rings, in combination with supporting anddriving belts, substantiallyin the manner and for the purposesdescribed.

2. .In a cockle-separating machine, the combination of a rotaryscreening-cylinder having imperforated annular portions between theperforated portions, in combination With-endless belts, which lap oversaid imperforated portions and embrace about two-thirds theoircumference of said cylinder, substantially as and for the purposesdescribed.

the rotary screening-cylinder, supporting and driving belts, and theendWise-adjustable pulleys therefor, adapted to operate substantially inthe manner and for the purposes described.

4. The combination of the rotary screeningcylinder, supporting anddriving belts therefor, and adjustable hangers for regulating thetension of the said belts, substantially in the manner and for thepurposes described.

5. The combination of the screening-cylinder,

the supporting and driving belts therefor, a.

device for regulating the tension of the belts, and pulleys which areadjustable endwise, all adapted to operate substantially in the mannerand for the purposes described.

6. In a cockle-screen, the combination of the screening-cylinder, thesupporting and driving belts therefor, and an adjustable brush arrangedinside of said cylinder, substantially in the manner and for thepurposes described.

7. In combination with the screening-cylinner, supporting and drivingbelts therefor, an agitatin g-wheel arranged eccentrically therein,andhaving blades which are set obliquely to the axis of this wheel,adapted to operate substantially in the manner and for the purposesdescribed.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two Witnesses.

JOHN B. GORNWALL.

Witnesses:

W. H. HILLHoUsE, J. SILAs LEAs.

